From 04a8aadb09f36726d877f46bfe0d16409b842ad2 Mon Sep 17 00:00:00 2001
From: matejcik <ja@matejcik.cz>
Date: Tue, 14 May 2019 12:59:05 +0200
Subject: [PATCH] ci: install clang-format 6

---
 ci/Dockerfile | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/ci/Dockerfile b/ci/Dockerfile
index 4f3dd0754..a8e71e60a 100644
--- a/ci/Dockerfile
+++ b/ci/Dockerfile
@@ -9,8 +9,12 @@ ENV TOOLCHAIN_FLAVOR=$TOOLCHAIN_FLAVOR
 
 RUN apt-get update && apt-get install -y \
     build-essential wget git libsodium-dev graphviz \
-    valgrind check libssl-dev libusb-1.0-0-dev libudev-dev zlib1g-dev \
-    clang-format
+    valgrind check libssl-dev libusb-1.0-0-dev libudev-dev zlib1g-dev
+
+# install clang-format 6 from backports
+RUN echo "deb http://deb.debian.org/debian stretch-backports main" > /etc/apt/sources.list.d/backports.list
+RUN apt-get update && apt-get install -t stretch-backports -y clang-format-6.0
+RUN ln -s clang-format-6.0 /usr/bin/clang-format
 
 # TODO are all apt packages actually needed?